chore(deps): replace cli-highlight (#4468)

packages/coding-agent/test/syntax-highlight.test.ts

@@ -0,0 +1,48 @@
+import { describe, expect, it } from "vitest";
+import { highlight, renderHighlightedHtml, supportsLanguage } from "../src/utils/syntax-highlight.js";
+
+describe("syntax highlight renderer", () => {
+	it("renders highlighted spans with the provided theme", () => {
+		const rendered = renderHighlightedHtml('<span class="hljs-keyword">const</span> value', {
+			keyword: (text) => `[keyword:${text}]`,
+		});
+		expect(rendered).toBe("[keyword:const] value");
+	});
+
+	it("decodes HTML entities emitted by highlight.js", () => {
+		const rendered = renderHighlightedHtml("&lt;tag attr=&quot;value&quot;&gt;&amp;#x41;&#65;&lt;/tag&gt;");
+		expect(rendered).toBe('<tag attr="value">&#x41;A</tag>');
+	});
+
+	it("inherits parent formatting for unmapped nested scopes", () => {
+		const interpolation = "$" + "{x}";
+		const rendered = renderHighlightedHtml(
+			`<span class="hljs-string">a<span class="hljs-subst">${interpolation}</span>b</span>`,
+			{
+				string: (text) => `[string:${text}]`,
+			},
+		);
+		expect(rendered).toBe(`[string:a][string:${interpolation}][string:b]`);
+	});
+
+	it("keeps parent formatting across unscoped nested spans", () => {
+		const rendered = renderHighlightedHtml('<span class="hljs-string">a<span class="language-xml">b</span>c</span>', {
+			string: (text) => `[string:${text}]`,
+		});
+		expect(rendered).toBe("[string:a][string:b][string:c]");
+	});
+
+	it("highlights code through highlight.js", () => {
+		expect(supportsLanguage("typescript")).toBe(true);
+		const rendered = highlight("const value = 1", {
+			language: "typescript",
+			ignoreIllegals: true,
+			theme: {
+				keyword: (text) => `[keyword:${text}]`,
+				number: (text) => `[number:${text}]`,
+			},
+		});
+		expect(rendered).toContain("[keyword:const]");
+		expect(rendered).toContain("[number:1]");
+	});
+});